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Server Error in '/' Application.

               Configuration Error 

                             Description: An error occurred during the processing  of a configuration file required to service this request. Please review  the specific error details below and modify your configuration file  appropriately.             

              Parser Error Message: Section or group name  'system.web.extensions' is already defined. Updates to this may only  occur at the configuration level where it is defined.

             Source Error: 

                                                                       Line 2:  <configuration>
Line 3:  	<configSections>
Line 4:  		<sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions">
Line 5:  			<sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions">
Line 6:  				<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions" requirePermission="false"/>                                                               
              Source File:  C:\WebsitePanel\Portal\web.config    Line:  4             

 
Show Additional Configuration Errors:
              
                                                         Section or group name 'scripting' is already defined. Updates to this may only occur at the configuration level where it is defined. (C:\WebsitePanel\Portal\web.config line 5)

Section or group name 'scriptResourceHandler' is already defined. Updates to this may only occur at the configuration level where it is defined. (C:\WebsitePanel\Portal\web.config line 6)

Section or group name 'webServices' is already defined. Updates to this may only occur at the configuration level where it is defined. (C:\WebsitePanel\Portal\web.config line 7)

Section or group name 'jsonSerialization' is already defined. Updates to this may only occur at the configuration level where it is defined. (C:\WebsitePanel\Portal\web.config line 8)

Section or group name 'profileService' is already defined. Updates to this may only occur at the configuration level where it is defined. (C:\WebsitePanel\Portal\web.config line 9)

Section or group name 'authenticationService' is already defined. Updates to this may only occur at the configuration level where it is defined. (C:\WebsitePanel\Portal\web.config line 10)